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D. A. SOHUTT.

FUSE BLOCK.

(N0 MbdL) 5 y m 5 w 5%? a m w M m W d i \n m UNITED STATES PATENTOFFICE.

DUNY A. SOHUTT, OF PERU, INDIANA, ASSIGNOR TO THE PERU ELECTRICMANUFACTURING COMPANY, OF SAME PLACE.

FUSE-BLOCK.

SPECIFICATION forming part of Letters Patent No. 595,585, dated December14, 1897.

Application filed A ril 16, 1897.

T aZZ whmn, it may concern.-

Be it known that I, DUNY A. SOHUTT, a citizen of the United States,residing at Peru, in the county of Miami and State of Indiana, haveinvented or discov ered a new and useful Improvement in Fuse-Blocks, ofwhich the following is a full, clear, and exact description,referencebeing had to the accompanying drawings, forming part of thisapplication, in which- Figure 1 is a View of my improved fuseblock inside elevation attached in position. Fig. 2 is an under plan Viewthereof. Fig. 3 is a vertical section, on an enlarged scale, taken onthe line III III of Fig. 1. Fig. 4 is a view in side elevation of thecentral contact-plug. Fig. 5 is a cross-section taken on the line V V ofFig. 3. Fig. 6 is a perspective detail view of the fuse. Fig. 7 is aperspective detail view of one of the contactsprings and connectionsthereto. Fig. 8 is a vertical section of the block at right angles toFig. 3, the plug being removed and the contact-springs andattachmentsbeing shown in detail. v My invention consists of animprovement in fuse-blocks for primary circuits from a transformer orcircuits of varying voltage for stationary motor-work.

Thep'rincipal objects of the invention are to provide a fuse-block whichshall be entirely free from dangerous contact, efficient in operation,weatherproof, and provided with a fuse of exceptional length, with meansfor furnishing a free and copious current of air to the interior.

Referring to the drawings, 2 is a domeshaped body of porcelain or othersuitable insulating material, circular in cross-section and rounded atthe top. The interior is hollow and is provided at the lower part withan internally-projecting annular flange 3, having opposite openings 4 4for the insertion of the contact-pins, as shall be hereinafterdescribed. Above the flange 3 is an annular space 5" of a widthsufficient to allow for the rotary passage of the contact-pins, theinter- .nal diameter of the space 5 corresponding to the internaldiameter of the hollow dome below the flange 3. At oppositely-locatedpoints Serial No. 632,439. (No model.)

and midway of the openings 4 4 are located the flat contact-springs 6,made in one piece, secured to a block 7 and provided with open flaringends 8.

A screw 9 securely holds the spring and block in position, passingthrough a contactbar 10, provided with a binding-screw 11, through theflange 3, and into the block '7; By this means when a wire 12 is securedby the screw 11 electrical'contact is made with the spring 6.

The center contact-plug 13 is provided with on twardly-extendin goppositely-located metal pins 14, securely attached to the porcelainplug by screws 15,-the plug being recessed at 16 to facilitate drivingof the screws. At their inner ends are secured to the plugs in anyconvenient manner, so as to insure electrical contact, the fuse-terminals 17, provided with screws 18, and to these terminals the endsof an intervening fuse 19 are attached. The upper portion of the plug is.somewhat reduced in diameter and is re cessed at 20 to receive thefuse. A longitudinal opening 21, running through the center of the plug,furnishes an ample supply of air to keep the fuse cool, and in case ofburning out of the fuse, and the groove 20 also aids in supplyingair tothe fuse.

It will be noticed that by my improved construction I secure a fuse ofconsiderable length, which is of great advantage in securing the bestresults.

In operating my device the plug is inserted in the hollow interior ofthe block, the pins 14 passing through the openings 4in the flange 3until they strike on the upper side of the space 5. The plug is thenturned to the right, as in the manner of making a bayonet-joint, untilthe ends .of the pins 14 enter between the ends 8 of the springs 77,thereby establishing a circuit from wire 12 to the spring, through pin14, fuse 19, through fuse to the opposite side, and to anotherconnecting-wire similarly attached at the other side. so in position,the plug is secure against displacement and cannot fall out or becomeeasilydislodged by reason of the insertion of the pin between thespringsand the retaining-flange 3. This feature of security is When 5 2 namesblocks, and Iconside-r it a main advantage of my invention. It will beseen that in this manner the contacts are made entirely within theinterior and remote from possible danger. The connections for the wiresare also underneath and inside the lower surrounding edge of the shellof the block, and all the working parts are thereby securely protectedfrom the weather, while the shape of the body of the box assists indischarging rain or snow.

The block is conveniently held in position by an encircling metal band22,clamped upon it by a screw 23 and attached to a wall or post bysecuring-bolts 24. I

The advantages of my invention will be appreciated by those skilled inthe art to which it appertains, and While variations may be made in theform or arrangement by the skilled mechanic I desire to include all suchvariations as within the scope of my invention.

\Vhat I claim, and desire to secure by Letters Patent, is

1. A fuse-block comprisinga circular domeshaped hollow body ofinsulating material, internal annular pin-retaining flanges integraltherewith on the opposite inside faces thereof with interveningopenings, an annu lar space above the flanges with oppositelylocatedcontact-springs therein provided with connections for feed-wires and aninsertible plug of insulating material provided with oppositely-locatedcontact-pins and a conneeting-fuse, substantially as set forth.

2. A fuseblock consisting of a circular dome-shaped hollow body ofinsulating material provided With a securing-bracket, internal annularpin-retaining flanges integral therewith on the opposite inside facesthereof with intervening openings, an annular space above the flangeswith oppositely-located contact-springs therein midway of the flangesconnected to binding-posts mounted on the outer face of the flanges,substantially as set forth.

3. The combination of a fuse-block consistin g of a circular dome-shapedhollow body of insulating material having internal annular pin-retainingflangesintegral therewith on the opposite inside faces thereof withintervening openings, an annular space above the flanges withoppositely-located contactsprings therein midway of the flanges withfeed-wire connections thereto, and a cylindrical plug having a hollowcenter, contactpins secured thereto at opposite sides and aconnecting-fuse joining the contact-pins, substantially as set forth.

In testimony whereof I have hereunto set my hand this 27th day ofJanuary, 1897.

DUNY' A. SCHUTT.

Witnesses:

WM. B. MOCLINTIC, Norr N, ANTRI

